But are Mark and Rhea hoping to keep the family growing past number four?

"I'm the youngest of nine, and my dad has a few others. No, four is enough," he explained. "We were all raised with a lot of love. But we didn't get the kind of attention I think that we all needed. My parents had to provide to put food on the table. My mission in life is to raise my kids right. With all the success I've had in the world, if I fail at that, my life means nothing."

But in the end, the 38-year-old actor said the decision is ultimately up to his wife.

"My wife is allowed to pick the magic number … as many as she wants to have," Mark continued. "What I want to do is I want to raise my kids right I want to give them the world. But I also want them to appreciate it."

Mark's brother, Jim Wahlberg – who was also at the event – thinks the Wahlberg funky bunch isn't done growing just yet.